Radio continuum emission in ring galaxies

Details Radio continuum emission in ring galaxies Radio continuum emission in ring galaxies

Mar 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980aj.....85..215g&link_type=abstract

Astronomical Journal, vol. 85, Mar. 1980, p. 215-225. NSF-supported research.

Astronomy and Astrophysics

Astronomy

5

Intergalactic Media, Radio Emission, Radio Sources (Astronomy), Ring Galaxies, Spiral Galaxies, Density Wave Model, Flux Density, Interferometers, Sky Surveys (Astronomy)

Scientific paper

Radio emission was found in two (Arp 118 and Arp 148) of 27 ring-type galaxies searched with the NRAO interferometer to a detection limit of about 10 mJy at 11.1 cm. These two were also observed at 6 cm with the higher sensitivity and resolution of the VLA. To allow a comparison of radio and optical features, optical positions and diameters were measured on the Palomar Sky Survey prints for 24 rings. Arp 148 contains a nonthermal, unresolved source near the centroid of the spindle. Arp 118 has three radio peaks coincident with optical emission knots located along an arc, as might result from the ring-shaped density wave model suggested for the case of II Hz 4 by Lynds and Toomre (1976). Three additional rings with detections cited in the literature are discussed (Arp 143, Arp 142, II Zw 188). There seems to be a tendency for the more irregular appearing galaxies to be radio sources.

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